I've sold several over the years since I've been collecting. Normally trying to raise money for other purchases of firearms or other stuff, sometimes just to help freinds out.
When I decide to sell, I normally look at my collection and ask which ones I like the least or which ones get the least range time. The overall quality of my collection keeps getting better and better. And as the years pass I tend to sell less and less as I've realized whenever I sell one, I just go out and buy a replacement that's even better (and more expensive). So I'm not actually doing myself any favors in the long run.
When I decide to sell, I normally look at my collection and ask which ones I like the least or which ones get the least range time. The overall quality of my collection keeps getting better and better. And as the years pass I tend to sell less and less as I've realized whenever I sell one, I just go out and buy a replacement that's even better (and more expensive). So I'm not actually doing myself any favors in the long run.